EP2275230B1 - Sander with adjustable handle - Google Patents

Sander with adjustable handle Download PDF

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Publication number
EP2275230B1
EP2275230B1 EP10168310.0A EP10168310A EP2275230B1 EP 2275230 B1 EP2275230 B1 EP 2275230B1 EP 10168310 A EP10168310 A EP 10168310A EP 2275230 B1 EP2275230 B1 EP 2275230B1
Authority
EP
European Patent Office
Prior art keywords
band
handle
grip
clamping
mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10168310.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2275230A2 (en
EP2275230A3 (en
Inventor
Hao Liu
Kenji Abe
Shigeru Takeda
Yuji Sakakibara
Hirokazu Kimata
Hideharu Muto
Shin Nakamura
Masanori Furusawa
Yoshio Sugiyama
Tomohiro Ukai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Makita Corp
Original Assignee
Makita Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Makita Corp filed Critical Makita Corp
Publication of EP2275230A2 publication Critical patent/EP2275230A2/en
Publication of EP2275230A3 publication Critical patent/EP2275230A3/en
Application granted granted Critical
Publication of EP2275230B1 publication Critical patent/EP2275230B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle

Definitions

  • the invention relates to a sander used for abrasive operation, according to the preamble of claim 1 (see e.g. DE 42 38 245 ).
  • Japanese laid-open patent publication No. 2004-167657 discloses a sander used for abrasive operation on a workpiece.
  • a grip as a main handle is integrally formed on an upper portion of a barrel of a housing which houses a driving mechanism.
  • the sander has a movable handle in the form of a side handle mounted on the barrel.
  • the side handle includes a handle holder that is detachably mounted on the barrel of the housing, and a grip that can be linearly moved with respect to the handle holder in a horizontal (back-and-forth) direction transverse to the direction of the central axis of the barrel and can be fixed at an arbitrary position within a range of this movement.
  • the orientation of the handle holder can be changed 180 degrees in the circumferential direction, so that the sander can serve both of left-handed and right-handed users.
  • a sander 101 mainly includes a motor (not shown), a generally cylindrical motor housing 103 that houses the motor and a power transmitting mechanism (not shown), and an abrasive part 105 disposed on the lower end of the motor housing 103 in its longitudinal direction (vertical direction as viewed in FIG. 1 ) and protruding downward from the motor housing 103.
  • the motor housing 103 forms a tool body and is a feature that corresponds to the "cylindrical housing" according to this invention.
  • the power transmitting mechanism serves to reduce the speed of the rotating power of the motor and transmit it to the abrasive part 105 and is a feature that corresponds to the "driving mechanism" according to this invention.
  • the direction of the arrow F is taken as the front and the direction of the arrow R is taken as the rear.
  • the abrasive part 105 includes a generally circular abrasive plate disposed below the motor housing 103.
  • An abrasive sheet (sandpaper) or the like is removably attached on a lower surface of the abrasive plate and forms an abrasive surface.
  • the abrasive surface of the abrasive part 105 is a feature that corresponds to the "rotational working surface" according to this invention.
  • the abrasive plate of the abrasive part 105 is rotatably supported at an eccentric position displaced from an output shaft of the power transmitting mechanism and driven by the motor via the power transmitting mechanism to perform eccentric motion and rotational motion.
  • the abrasive part 105 is driven with the abrasive surface of the abrasive part 105 pressed against the workpiece, so that a workpiece can be ground or polished by the abrasive surface.
  • the driving structure for causing the eccentric motion and rotational motion of the abrasive part 105 is known and therefor it is not described in further detail.
  • the motor housing 103 is generally cylindrical, and a grip 107 which can be held by user's hand is formed in an upper region of the cylindrical part.
  • the grip 107 according to this embodiment includes a first grip part 107a and a second grip part 107b.
  • the first grip part 107a is generally elliptical in plan view and designed to be held by the user in such a manner as to be wrapped in (pressed down) from above in the user's entire palm.
  • the second grip part 107b is generally cylindrical and extends contiguously to the first grip part 107a and horizontally in a rearward direction.
  • the grip 107 is a feature that corresponds to the "second handle” and "fixed handle” according to this invention.
  • a trigger switch 109 is disposed on the underside of the contiguous region between the first grip part 107a and the second grip part 107b and depressed by user's finger to start the motor.
  • the trigger switch 109 is disposed in a base region of the second grip part 107b contiguous to the first grip part 107a, or between the grip parts 107a and 107b. Therefore, the trigger switch 109 is located close to both of the grip parts 107a and 107b, so that it can be easily operated whether the user holds the first grip part 107a or the second grip part 107b.
  • a lower region of the cylindrical part of the motor housing 103 is provided as a lower housing 111 having not only the function of housing the power transmitting mechanism and rotatably supporting the abrasive part 105, but a dust collecting function.
  • the lower housing 111 has a dust collecting passage for collecting dust which is generated by abrasive operation of the abrasive part 105.
  • a dust discharge nozzle 113 is provided in the lower housing 111 and a dust collecting bag is attached to the dust discharge nozzle 113 so that dust is collected in the bag.
  • a handle mounting part 115 for mounting a side handle 117 is formed in a middle region of the cylindrical part of the motor housing 103 or on an outer circumferential surface of the motor housing 103 between the grip 107 and the lower housing 111.
  • the handle mounting part 115 is provided as a circular recessed portion having a smaller diameter than the other regions around a central axis of the motor housing 103.
  • the side handle 117 is detachably mounted to the handle mounting part 115.
  • the side handle 117 is a feature that corresponds to the "movable handle” according to this invention.
  • the side handle 117 mainly includes a mounting band 121 detachably mounted to the handle mounting part 115, and a grip part 131 to be held by the user.
  • the mounting band 121 and the grip part 131 are features that correspond to the "band” and the "grip", respectively, according to this invention.
  • the mounting band 121 includes a pair of semicircular arc band components 123A, 123B which are opposed to each other and form a ring-like shape.
  • One end of each of the band components 123A, 123B is connected to one end of the other via a pin 125 such that the band components 123A, 123B can be opened and closed (pivot with respect to each other).
  • the other end of each of the band components 123A, 123B is a free end. Therefore, the mounting band 121 can be wrapped around the handle mounting part 115 by turning the band components 123A, 123B inward on the pin 125 so as to close them, while the mounting band 121 can be detached from the handle mounting part 115 by opening the band components outward.
  • the grip part 131 is generally shaped like an eggplant. One end of the grip part 131 in the longitudinal direction is connected to the free end of the mounting band 121 such that the mounting band 121 can be tightened and loosened around the handle mounting part 115 by turning the grip part 131 around its longitudinal axis with the mounting band 121 wrapped around the handle mounting part 115.
  • the structure of connecting the grip part 131 and the mounting band 121 is now explained below.
  • the grip part 131 has a hollow hole open on the side of connection with the mounting band 121 and extending in the longitudinal direction.
  • a clamping tapered hole 133 tapered toward the depth of the hole is formed in the open end region of the hollow hole.
  • a female threaded part (threaded hole) 135 for clamping operation is formed at the back of the clamping tapered hole 133 in the hollow hole.
  • Bases 123a, 123b are formed on the free ends of the band components 123A, 123B of the mounting band 121, respectively, and extend outward therefrom. Each of the bases 123a, 123b has a semicircular outer surface tapered toward the extending end.
  • the bases 123a, 123b are opposed to each other so that the outer surfaces of the bases form a circular tapered surface. In this opposed state, the bases 123a, 123b are fitted in the clamping tapered hole 133 of the grip part 131.
  • a male threaded part 127 for clamping operation is formed on one base 123a and extends from the extending end of the base 123a.
  • the male threaded part 127 is threadably engaged with the female threaded part 135 of the grip part 131. Therefore, when the grip part 131 is turned, the male threaded part 127 and the female threaded part 135 turn with respect to each other, so that the grip part 131 and the mounting band 121 move toward or away from each other in the longitudinal direction according to the turning direction of the grip part 131.
  • the bases 123a, 123b fitted in the clamping tapered hole 133 are clamped by the clamping tapered hole 133, or released from the clamping.
  • the mounting band 121 is tightened in a direction that reduces its diameter, or it is loosened.
  • the clamping tapered hole 133 and the bases 123a, 123b form the "clamping part” according to this invention, and the female threaded part 135 and the male threaded part 127 form the "clamping operation part" according to this invention.
  • the one base 123a contiguously connected to the male threaded part 127 has a generally semicircular arc section so as to ensure a predetermined strength and to avoid interference with the other base 123b.
  • the sander 101 is constructed as described above, and its usage is now explained.
  • the abrasive part 105 performs eccentric motion and rotational motion.
  • a predetermined abrasive operation can be performed on a workpiece by pressing the abrasive part 105 against the workpiece.
  • the position of the side handle 117 (the position of the grip part 131) can be arbitrarily changed. Specifically, in order to loosen the mounting band 121 tightly wrapped around the handle mounting part 115 and allow the mounting band 121 to be turned around the handle mounting part, the grip part 131 is turned in a direction that moves away from the mounting band 121 so that the clamping of the bases 123a, 123b by the clamping tapered hole 133 is released. Therefore, in this state, the position of the side handle 117 can be arbitrarily changed by turning the side handle 117 around the central axis of the motor housing 103. Further, after such positional change, the mounting band 121 can be securely fixed to the handle mounting part 115 by turning the grip part 131 in the opposite direction.
  • the side handle 117 can be easily adjusted steplessly to a desired position by turning the side handle 117 in a horizontal direction around the central axis of the motor housing 103.
  • the side handle 117 mounted on the motor housing 103 can be adjusted in position within the range of 360 degrees. Therefore, the side handle 117 can be easily adjusted whether the user is left-handed or right-handed.
  • the side handle 117 can also be placed in a front position to be opposed to the rear second grip part 107b of the grip 107.
  • the sander 101 can be provided which can easily realize a suitable working posture for the user so that the working efficiency is effectively improved.
  • the mounting band 121 is tightened and loosened around the handle mounting part 115 of the motor housing 103 by turning the grip part 131.
  • the grip part 131 also serves as an operating member which is operated to tighten and loosen the mounting band 121.
  • the number of components of the side handle 117 can be reduced.
  • the side handle 117 is constructed such that the grip part 131 and the mounting band 121 are connected to each other by a threaded structure.
  • the length of threadable engagement between the male threaded part 127 and the female threaded part 135 is set such that the threadable engagement is maintained even if the base 123b not having the male threaded part 127 is detached from the clamping tapered hole 133 of the grip part 131. Therefore, the grip part 131 and the mounting band 121 can be avoided from being separated from each other even if the side handle 117 is detached from the motor housing 103.
  • each of the bases 123a, 123b of the band components 123A, 123B has a tapered outer surface, and the bases 123a, 123b are clamped by the clamping tapered hole 133 of the grip part 131. Therefore, the mounting band 121 can be securely fixed to the handle mounting part 115 by the wedge action of the tapered engagement surfaces of the clamping tapered hole 133 and the bases 123a, 123b.
  • FIGS. 4 and 5 a side handle according to an embodiment not according to the invention is described with reference to FIGS. 4 and 5 .
  • the entire structure of the sander 101 to which the side handle is attached is not particularly changed from the first embodiment, and therefore, its components are given like numerals as in the first embodiment and will not be described or will be only briefly described. The same goes for not only the second embodiment, but third and later embodiments.
  • a side handle 141 mainly includes a ring-like mounting band 143 which is wrapped around the handle mounting part 115 formed on the motor housing 103 of the sander 101, and a grip part 147 to be held by a user.
  • the side handle 141, the mounting band 143 and the grip part 147 are features that correspond to the "movable handle", the "band” and the “grip”, respectively, according to this invention.
  • the mounting band 143 includes a pair of semicircular arc band components 145A, 145B which are opposed to each other and form a ring-like shape.
  • One end of each of the arc band components 145A, 145B is connected to one end of the other via a pin 146 such that the band components 145A, 145B can be opened and closed (pivot with respect to each other).
  • the other end of each of the band components 145A, 145B is a free end.
  • the mounting band 143 can be wrapped around the handle mounting part 115 by turning the band components 145A, 145B inward on the pin 146 so as to close them, while the mounting band 143 can be detached from the handle mounting part 115 by opening the band components outward.
  • the grip part 147 is disposed on the outside of the mounting band 143 such that its central axis lies on a straight line passing through the center of mounting band 143 in a radial direction.
  • One end of the grip part 147 in the longitudinal direction is connected to the free end of the mounting band 143 such that the mounting band 143 can be tightened and loosened around the handle mounting part 115 by turning the grip part 147 around its longitudinal axis with the mounting band 143 wrapped around the handle mounting part 115.
  • the grip part 147 is generally shaped like an eggplant.
  • a clamping tapered hole 148 tapered toward the depth of the hole is formed on one end of the grip part 147 in its longitudinal direction.
  • Bases 145a, 145b are formed on the free ends of the band components 145A, 145B of the mounting band 143, respectively, and extend radially outward therefrom.
  • Each of the bases 145a, 145b has a semicircular outer surface tapered toward the extending end. Therefore, when the mounting band 143 is closed, the bases 145a, 145b are opposed to each other so that the outer surfaces of the bases form a circular tapered surface. In this opposed state, the bases 145a, 145b are fitted in the clamping tapered hole 148 of the grip part 147.
  • a nut 151 is disposed within the grip part 147 in such a manner as to be prevented from moving in the axial and circumferential directions.
  • the nut 151 can be fixedly disposed within the grip part 147, for example, by forming the grip part 147 by two halves connected together, or by insert molding in the process of forming the grip part 147.
  • a bolt 153 is disposed between the bases 145a, 145b of the band components 145A, 145B and locked against rotation by the bases 145a, 145b. The bolt 153 is inserted into the central hole of the grip part 147 in the longitudinal direction and threadably engaged with the nut 151.
  • the clamping tapered hole 148 and the bases 145a, 145b form the "clamping part”
  • the nut 151 and the bolt 153 form the "clamping operation part".
  • the side handle 141 is constructed as described above. Therefore, when the grip part 147 is turned in one direction (for example, clockwise), the grip part 147 moves in a direction toward the mounting band 143 by relative rotation of the nut 151 and the bolt 153 in the longitudinal direction. As a result, the bases 145a, 145b are clamped by the clamping tapered hole 148, so that the mounting band 143 is contracted and clamped on the handle mounting part 115. When the grip part 147 is turned in the other direction, the grip part 147 moves in a direction away from the mounting band 143 by relative rotation ofthe nut 151 and the bolt 153 in the longitudinal direction. As a result, the clamping of the bases 145a, 145b by the clamping tapered hole 148 is released, so that the mounting band 143 is expanded and released from the clamping on the handle mounting part 115.
  • the mounting band 143 tightly wrapped around the handle mounting part 115 is loosened, the mounting band 143 is allowed to be turned around the handle mounting part. Therefore, in this state, the position of the side handle 141 (the position of the grip part 147) can be arbitrarily changed by turning the side handle 141 around the central axis of the motor housing 103. Further, after such positional change, the side handle 141 can be securely fixed to the handle mounting part 115 by tightening the mounting band 143.
  • the side handle 141 can be easily adjusted to a desired position according to the operation.
  • the structure of tightening the mounting band 143 is simply constructed by using the bolt 153 and the nut 151, so that the sander is easy to manufacture and reduced in cost.
  • This embodiment is a modification to the above-described side handle 141 of the second embodiment.
  • the nut 151 is disposed between the bases 145a, 145b of the mounting band 143, and the bolt 153 is disposed in the grip part 147.
  • this embodiment is similarly constructed as the second embodiment.
  • a stepped through hole 147a having a hexagonal hole is centrally formed through the grip part 147, and the bolt 153 is inserted into the stepped through hole 147a and locked against rotation. In this state, the bolt 153 is threadably engaged with the nut 151.
  • the bolt 153 may be formed by insert molding in the grip part 147.
  • a side handle 161 according to this embodiment mainly includes a ring-like mounting band 163 which is wrapped around the handle mounting part 115 formed on the motor housing 103 of the sander 101, and a grip part 167 to be held by a user.
  • the side handle 161, the mounting band 163 and the grip part 167 are features that correspond to the "movable handle", the "band” and the “grip”, respectively, according to this invention.
  • the mounting band 163 includes a pair of semicircular arc band components 165A, 165B which are opposed to each other and form a ring-like shape.
  • One end of each of the semicircular arc band components 165A, 165B is connected to one end of the other via a pin 166 such that the band components 165A, 165B can be opened and closed (pivot with respect to each other).
  • the other end of each of the band components 165A, 165B is a free end.
  • Plate-like bases 165a, 165b are formed on the free ends such that the bases are opposed to each other with a predetermined spacing and extend radially outward from the free ends.
  • the mounting band 163 can be wrapped around the handle mounting part 115 by turning the band components 165A, 165B inward on the pin 166 so as to close them, while the mounting band 163 can be detached from the handle mounting part 115 by opening the band components outward.
  • the grip part 167 is disposed on the outside of the mounting band 163 such that its central axis extends in a direction transverse to the extending direction of the bases 165a, 165b of the mounting band 163.
  • the grip part 167 is generally shaped like an eggplant and has a bolt 168 protruding in its longitudinal direction through one end surface 167b in the longitudinal direction.
  • the bolt 168 is loosely fitted and extends through the bases 165a, 165b, and a nut 169 is threadably mounted on an extending end of the bolt 168.
  • a stepped through hole 167a having a hexagonal hole is centrally formed through the grip part 167, and the bolt 168 is inserted into the stepped through hole 167a and locked against rotation.
  • the bolt 168 may be formed by insert molding in the grip part 167.
  • the side handle 161 is constructed as described above. Therefore, when the grip part 167 is turned in one direction (for example, clockwise), the bases 165a, 165b of the band components 165A, 165B are clamped between the nut 169 and the end surface 167b of the grip part 167 by relative rotation of the bolt 168 and the nut 169 in the longitudinal direction. As a result, the mounting band 163 is contracted and clamped on the handle mounting part 115. When the grip part 167 is turned in the other direction, the clamping of the bases 165a, 165b between the nut 169 and the end surface 167b of the grip part 167 by relative rotation of the bolt 168 and the nut 169 in the longitudinal direction is released. Thus, the mounting band 163 is expanded and released from the clamping on the handle mounting part 115. The bolt 168 and the nut 169 form the "clamping part".
  • the side handle 161 (the grip part 167) can be easily adjusted to a desired position according to the operation.
  • the structure of tightening the mounting band 163 is simply constructed by using the bolt 168 and the nut 169, so that the sander is easy to manufacture and reduced in cost.
  • the bolt 168 is fixed to the grip part 167, not the bolt 168 but the nut 169 may be fixed to the grip part 167.
  • the side handle of this embodiment is different from the side handle 117 of the first embodiment in that recesses 139 are formed in the inner circumferential surface of the side handle 117 of the first embodiment and can be engaged with projections 137 formed on the handle mounting part 115 of the motor housing 103.
  • recesses 139 are formed in the inner circumferential surface of the side handle 117 of the first embodiment and can be engaged with projections 137 formed on the handle mounting part 115 of the motor housing 103.
  • it has the same construction. Therefore, the entire structure of the side handle 117 is given like numerals as in the first embodiment and will not be described or will be only briefly described.
  • a plurality of (eight in this embodiment) projections 137 having a rectangular section in plan view and having a predetermined length extending in the longitudinal direction of the motor housing 103 (the vertical direction) are formed on the outer circumferential surface of the handle mounting part 115 and spaced equidistantly in the circumferential direction. As shown in FIGS. 11 and 12 , the projections 137 are disposed on a lower portion of the handle mounting part 115.
  • a plurality of recesses 139 each having an open lower end are formed in the inner circumferential surface of a lower portion of the band components 123A, 123B of the mounting band 121 and spaced like the projections 137 in the circumferential direction.
  • the mounting band 121 When released from the clamping on the handle mounting part 115, the mounting band 121 is allowed to slide in the longitudinal direction (the vertical direction) with respect to the handle mounting part 115. At this time, when the mounting band 121 is moved downward, the recesses 139 are engaged with the projections 137, and when the mounting band 121 is moved upward, this engagement is released. Specifically, the side handle 117 is allowed to slide between the engagement position in which the projections 137 and the recesses 139 are engaged with each other and the disengagement position in which the engagement is released.
  • the side handle 117 is constructed as described above. Therefore, in order to change the position of the side handle 117 (the position of the grip part 131), the mounting band 121 is released from the clamping on the handle mounting part 115 by turning the grip part 131 around the longitudinal axis of the grip part 131, and then, as shown in FIG. 12 , the whole side handle 117 is slid upward such that the recesses 139 are disengaged from the projections 137 of the handle mounting part 115. Thus, the engagement of the recesses 139 with the projections 137 can be released.
  • the side handle 117 is moved to a desired position in the circumferential direction with respect to the handle mounting part 115 and slid downward such that the recesses 139 are engaged with the protrusions 137. Thereafter, by turning the grip part 131, the mounting band 121 is tightened and fixedly mounted on the handle mounting part 115.
  • the position of the side handle 117 (the position ofthe grip part 131) can be easily adjusted to a desired position according to the operation. Further, particularly in this embodiment, by engagement of the projections 137 and the recesses 139, the side handle 117 clamped on the handle mounting part 115 can be provided with a stronger resistance to relative movement in the circumferential direction.
  • the position of the side handle 117 is described as being changed in 45-degree increments, but the increments can be appropriately changed by changing the numbers of the projections 137 and the recesses 139.
  • the projections 137 are formed on the handle mounting part 115 side (the motor housing 103 side) and the recesses 139 are formed on the side handle 117 side, but the recesses 139 may be formed on the handle mounting part 115 side and the projections 137 may be formed on the side handle 117 side.
  • a side handle 171 according to this embodiment mainly includes a ring-like mounting band 173 which is wrapped around the handle mounting part 115 of the motor housing 103, and a grip part 177 to be held by a user.
  • the side handle 171, the mounting band 173 and the grip part 177 are features that correspond to the "movable handle", the "band” and the “grip”, respectively, according to this invention.
  • the mounting band 173 includes a pair of semicircular arc band components 175A, 175B which are opposed to each other and form a ring-like shape.
  • One end of each of the semicircular arc band components 175A, 175B is connected to one end of the other via a pin 176 such that the band components 175A, 175B can be opened and closed (pivot with respect to each other).
  • the other end of each of the band components 175A, 175B is a free end, and a band fastener 181 which will be described below is mounted on the free end.
  • the band fastener 181 is a feature that corresponds to the "band fastener" according to this invention.
  • the mounting band 173 has a radially outwardly protruding threaded shaft 175a formed on the end of the one band component 175A on the side of the connection between the band components 175A, 175B by the pin 176.
  • the grip part 177 is generally shaped like an eggplant and has a threaded hole 177a extending from one end in its longitudinal direction.
  • the grip part 177 is connected to the mounting band 173 by threadably engaging the threaded hole 177a with the threaded shaft 175a of the mounting band 173.
  • the grip part 177 is arranged such that its central axis lies on a straight line radially passing through the center of the mounting band 173 and the grip part 177 is integrally formed with the mounting band 173.
  • the band fastener 181 mainly includes an operating lever 185 mounted on the free end of the other band component 175B which does not have the threaded shaft 175a, and a generally rectangular hook ring 187 connected to the operating lever 185.
  • the operating lever 185 and the hook ring 187 are features that correspond to the "operating member” and the "hook member”, respectively.
  • the operating lever 185 can be turned around a shaft 183 which is parallel to the pin 176.
  • the hook ring 187 is connected to the operating lever 185 such that the hook ring 187 can rotate around a pivot which is parallel to the shaft 183.
  • a front end of the hook ring 187 on the side opposite from the pivot can be engaged with and disengaged from a hook 189 which is formed on the free end of the other band component 175A.
  • the side handle 171 is constructed as described above.
  • the mounting band 173 is wrapped around the handle mounting part 115 and the front end of the hook ring 187 is engaged with an engagement part in the form of the hook 189 (as shown by two-dot chain line A in FIG. 15 ).
  • a pivot of the operating lever 185 (the shaft 183) lies on the outside of a straight line X connecting a point (pivot) 187a of connection of the hook ring 187 with the operating lever 185 and a point 187b of engagement of the hook ring 187 with the hook 189.
  • the band fastener 181 of this embodiment is a self-locking fastener using a toggle mechanism, and the mounting band 173 can be securely tightened and fixedly mounted on the handle mounting part 115.
  • This state is shown by solid line in FIG. 15 .
  • the lock can be released by turning the operating lever 185 away from the outer surface of the mounting band 173. In this state (shown by two-dot chain line A in FIG.
  • the position of the side handle 171 can be arbitrarily changed by turning the mounting band 173 around the longitudinal axis of the handle mounting part 115. Further, in the state in which the hook ring 187 is disengaged from the hook 189 as shown by two-dot chain line B in FIG. 15 , the side handle 171 can be detached from the handle mounting part 115.
  • the position of the side handle 117 (the position ofthe grip part 131) can be easily adjusted to a desired position according to the operation.
  • the mounting band 173 can be tightened and loosened by using the self-locking band fastener 181
  • the mounting band 173 can be easily tightened and loosened.
  • a side handle 191 mainly includes a ring-like mounting ring 193 which is attached to the handle mounting part 115 of the motor housing 103, and a grip part 197 to be held by a user.
  • the side handle 191, the mounting ring 193 and the grip part 197 are features that correspond to the "movable handle", the "ring” and the "grip", respectively.
  • the mounting ring 193 includes a pair of ring components 195A, 195B which are opposed to each other and form a ring-like shape.
  • the ring components 195A, 195B are two semicircular halves of the mounting ring 193 in the circumferential direction.
  • a grip part 197 is integrally formed with each of the ring components 195A, 195B and extends radially outward from the middle of the ring component in the circumferential direction.
  • Connecting flanges 195a, 195b are formed on both ends of the ring components 195A, 195B in the circumferential direction and protrude radially outward.
  • the ring components 195A, 195B are positioned to hold the handle mounting part 115 of the motor housing 103 from its both sides, and in this state, the connecting flanges 195a, 195b are fastened and connected together by fastening screws 198.
  • the side handle 191 of this embodiment is provided as a straight handle having the two grip parts 197 arranged on a line on the outside of the mounting ring 193.
  • a predetermined clearance is formed between the inner circumferential surfaces of the ring components 195A, 195B and the outer circumferential surface of the handle mounting part 115.
  • a plurality of O-rings 199 made of a flexible material such as rubber are disposed at predetermined intervals in the longitudinal direction between the inner circumferential surfaces of the ring components 195A, 195B and the outer circumferential surface of the handle mounting part 115.
  • Each of the O-rings 199 is held by an O-ring groove 199a having a semicircular section and formed in the inner circumferential surfaces of the ring components 195A, 195B and an O-ring groove 199b having a semicircular section and formed in the outer circumferential surface of the handle mounting part 115.
  • the mounting ring 193 is mounted on the handle mounting part 115 via the O-rings 199, and the mounting ring 193 is held by friction between the O-rings 199 and the O-ring grooves 199a on the side handle 191 side or the O-ring grooves 199b on the handle mounting part 115 side. Therefore, the position of the grip part 197 of the side handle 191 can be changed by turning the side handle 191 around the longitudinal axis of the handle mounting part 115 against the above-described friction.
  • each of the O-rings 199 is provided as a frictional member and is a feature that corresponds to the "frictional member" according to this invention.
  • the friction can be adjusted by adjusting the force of fastening the ring components 195A, 195B by the fastening screws 198.
  • the frictional member is not limited to the O-ring 199, but any other frictional member may be used, or the frictional member may have a structure split in the circumferential direction.
  • the position of the side handle 191 (the position of the grip part 197) can be easily adjusted to a desired position according to the operation.
  • the O-rings 199 as a frictional member, transmission of vibration caused in the motor housing 103 during operation to the side handle 191 can be reduced, so that a vibration-proofing handle can be provided.
  • a side handle 211 mainly includes a cross-shaped mounting part 213 which is attached to the handle mounting part 115 of the motor housing 103, and a grip part 215 to be held by a user.
  • the side handle 211and the grip part 215 are features that correspond to the "movable handle” and the "grip", respectively, according to this invention.
  • the cross-shaped mounting part 213 includes a threaded shaft 217 and a slide nut 219.
  • the threaded shaft 217 is disposed within the grip part 215 and protrudes through one end surface of the grip part 215 in its longitudinal direction.
  • the slide nut 219 is threadably mounted on the protruding end of the threaded shaft 217 and can slide within a slide guide groove 221 of the handle mounting part 115.
  • the threaded shaft 217 and the slide nut 219 are features that correspond to the "adjusting member" and the "slider", respectively, according to this invention.
  • the threaded shaft 217 can be fixedly disposed within the grip part 215, for example, by forming the grip part 215 by two halves connected together, or by insert molding in the process of molding the grip part 215.
  • the slide guide groove 221 having a cross-shaped section is formed in the handle mounting part 115 of the motor housing 103 and extends in the circumferential direction.
  • the slide nut 219 is disposed within the slide guide groove 221.
  • the slide guide groove 221 having a cross-shaped section is open at an opening 221a all around the outer circumferential surface of the handle mounting part 115.
  • the threaded shaft 217 of the grip part 215 is threadably engaged through the slide nut 219 within the slide guide groove 221 via the opening 221a.
  • the slide guide groove 221 is a feature that corresponds to the "guide groove” according to this invention.
  • the slide nut 219 moves toward the grip part 215 with respect to the threaded shaft 217.
  • the end surface of the grip part 215 is pressed against the outer surface of the handle mounting part 115, and a surface of the slide nut 219 which faces the end surface of the grip part is pressed against the inner wall surface of the slide guide groove 221.
  • the handle mounting part 115 is clamped by the grip part 215 and the slide nut 219 in the radial direction from outside and inside, so that the side handle 211 is fixed to the handle mounting part 115.
  • the grip part 215 is turned in the opposite direction, the clamping of the grip part 215 and the slide nut 219 is released. In the released state, the position of the grip part 215 can be changed by sliding the slide nut 219 along the slide guide groove 221.
  • the position of the side handle 211 (the position of the grip part 215) can be easily adjusted to a desired position according to the operation.
  • the grip 107 is described as being formed as a fixed handle in the upper region of the motor housing 103, but the grip 107 may be a movable handle.
  • the sander 101 may have two movable handles which can be individually turned around the same axis or different axes with respect to the motor housing 103 and are arranged one above the other on the motor housing 103 in the direction of its central axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP10168310.0A 2009-07-06 2010-07-02 Sander with adjustable handle Active EP2275230B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009159862 2009-07-06
JP2010004009A JP5297392B2 (ja) 2009-07-06 2010-01-12 サンダー

Publications (3)

Publication Number Publication Date
EP2275230A2 EP2275230A2 (en) 2011-01-19
EP2275230A3 EP2275230A3 (en) 2012-08-22
EP2275230B1 true EP2275230B1 (en) 2017-02-15

Family

ID=42937475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10168310.0A Active EP2275230B1 (en) 2009-07-06 2010-07-02 Sander with adjustable handle

Country Status (5)

Country Link
US (1) US20110003541A1 (ru)
EP (1) EP2275230B1 (ru)
JP (1) JP5297392B2 (ru)
CN (1) CN101941172A (ru)
RU (1) RU2455143C2 (ru)

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JP6667236B2 (ja) * 2015-09-10 2020-03-18 株式会社マキタ グラインダ、カバー及びカバーセット
JP6655425B2 (ja) * 2016-02-26 2020-02-26 三菱重工業株式会社 研磨装置
CN108188907B (zh) * 2018-03-12 2023-12-22 广西电网有限责任公司北海供电局 高处作业打磨抛光装置
CN109866095B (zh) * 2019-03-31 2020-10-20 连云港三明石英制品有限公司 一种基于定位限位打磨物料的磨砂机
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Also Published As

Publication number Publication date
JP2011031383A (ja) 2011-02-17
EP2275230A2 (en) 2011-01-19
CN101941172A (zh) 2011-01-12
JP5297392B2 (ja) 2013-09-25
RU2010127871A (ru) 2012-01-10
US20110003541A1 (en) 2011-01-06
RU2455143C2 (ru) 2012-07-10
EP2275230A3 (en) 2012-08-22

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